646165922 has 8 divisors (see below), whose sum is σ = 1000515072. Its totient is φ = 312660900.

The previous prime is 646165909. The next prime is 646165931. The reversal of 646165922 is 229561646.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×646165922² = 835060797508220168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 646165922.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5210954 + ... + 5211077.

It is an arithmetic number, because the mean of its divisors is an integer number (125064384).

Almost surely, 2^646165922 is an apocalyptic number.

646165922 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

646165922 is a deficient number, since it is larger than the sum of its proper divisors (354349150).

646165922 is a wasteful number, since it uses less digits than its factorization.

646165922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10422064.

The product of its digits is 155520, while the sum is 41.

The square root of 646165922 is about 25419.7939016035. The cubic root of 646165922 is about 864.5325515158.

The spelling of 646165922 in words is "six hundred forty-six million, one hundred sixty-five thousand, nine hundred twenty-two".